package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

/**
 * ClassName: SetmealServiceImpl
 * Package: com.sky.service.impl
 * Description:
 *
 * @Author 谢依雯
 * @Create 2024/11/25 16:10
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 根据套餐信息动态查询所有套餐
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        return setmealMapper.list(setmeal);
    }

    /**
     * 根据套餐id查询包含的菜品
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemById(id);
    }

    /**
     * 分页查询套餐
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);

        PageResult pageResult=new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Override
    public void insertWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //插入套餐数据
        setmealMapper.insert(setmeal);

        //插入套餐关联菜品的信息
        List<SetmealDish> list=setmealDTO.getSetmealDishes();
        list.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmeal.getId());
        });
        setmealDishMapper.insertBatch(list);
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id) {
        return setmealMapper.getByIdWithDish(id);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    public void delete(List<Long> ids) {
        //起售套餐不能删除
        ids.forEach(id->{
            Setmeal setmeal=setmealMapper.getByid(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(id->{
            //删除套餐表中的数据
            setmealMapper.deleteByid(id);
            //删除套餐菜品关系表中的所有菜品
            setmealDishMapper.deleteBySetmealId(id);
        });
    }

    /**
     * 修改套餐起售，停售
     * @param status
     * @param id
     */
    public void isOpen(int status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status==StatusConstant.ENABLE){
           List<Dish> dishList=dishMapper.getBySetmealId(id);
           dishList.forEach(d->{
               if(d.getStatus()==StatusConstant.DISABLE){
                   throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
               }
           });
        }

        Setmeal setmeal=Setmeal.builder()
                .status(status)
                .id(id)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 修改套餐
     * @param setmealVO
     */
    public void update(SetmealVO setmealVO) {
        //1、修改套餐表，执行update
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealVO,setmeal);
        setmealMapper.update(setmeal);

        //获取套餐id
        Long setmealId=setmealVO.getId();
        //2、删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);
        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        List<SetmealDish> setmealDishes=setmealVO.getSetmealDishes();
        setmealDishes.forEach(dish->{
            dish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishes);
    }


}
